hi there. i have two males i want to bond to a female, but im looking for some encouragement because i’ve read that it could potentially break the bond between my two boys. what factors play in to this? 

my two boys (Tibbers and Buffalo) are very gentle and not aggressive. the female (Fern) i’m looking to adopt and bond with them is also not aggressive, but very scared and shy.

everybody is fixed, but i have no idea how old they are because i adopted them from rescues. im assuming they are middle-aged.

Tib and Buffy have been bonded for a year. their bond was almost instant. Tibbers is very sweet, curious, energetic, and loves to explore. the best way i can describe Buffy is content. he just always seems happy. even when i was bonding them, he was receptive. Tibbers did show a bit of aggression twice during their bonding process–Buffy was exploring inside Tibbers’ pen, so Tibbers lunged and grunted at Buffy, but no nipping or anything else. Buffy usually humps Tibbers in the morning, when i greet them and open their pen up.

before Buffy, Tibbers was bonded to a slightly aggressive and very timid fixed female, Annie. Tibbers was very receptive to her but she was not impressed with him for about 8 months. She passed away only two months after they bonded. 

Tibbers is happy with his pal Buffy now, but he has a different relationship with Buffy than he did with Annie and i think both Buffy and Tibbers would love another bunny to hang around.

now i feel like it would be a relatively easy bond, as nobody appears to be aggressive and the boys have been receptive to others in the past, but i want to be aware of all of the things that could happen or go wrong. could Tibbers become aggressive towards Buffy after a female is introduced? could Buffalo become jealous? what exactly causes a pair to break their bond?

thanks in advance! excited to hear some opinions